/*
GanttProject is an opensource project management tool.
Copyright (C) 2011 GanttProject Team

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
*/
package net.sourceforge.ganttproject.task.dependency;

import java.util.Date;

import net.sourceforge.ganttproject.language.GanttLanguage;
import net.sourceforge.ganttproject.task.Task;
import net.sourceforge.ganttproject.task.TaskActivity;

/**
 * Created by IntelliJ IDEA. User: bard Date: 14.02.2004 Time: 2:32:17 To change
 * this template use File | Settings | File Templates.
 */
public interface TaskDependency {
    abstract class Hardness {
        public static final Hardness RUBBER = new Hardness("Rubber"){
            @Override
            public String toString() {
                return GanttLanguage.getInstance().getText("hardness.rubber");
            }
        };
        public static final Hardness STRONG = new Hardness("Strong"){
            @Override
            public String toString() {
                return GanttLanguage.getInstance().getText("hardness.strong");
            }
        };
        public static Hardness parse(String hardnessAsString) {
            if (hardnessAsString==null) {
                throw new IllegalArgumentException("Null value is not allowed as hardness");
            }
            if ("Rubber".equals(hardnessAsString.trim())) {
                return RUBBER;
            }
            if ("Strong".equals(hardnessAsString.trim())) {
                return STRONG;
            }
            throw new IllegalArgumentException("Unexpected hardness string value="+hardnessAsString);
        }
        private String myID;

        private Hardness(String id) {
            myID = id;
        }
        public String getIdentifier() {
            return myID;
        }
    }

    Task getDependant();

    Task getDependee();

    void setConstraint(TaskDependencyConstraint constraint);

    TaskDependencyConstraint getConstraint();

    ActivityBinding getActivityBinding();

    void delete();

    interface ActivityBinding {
        TaskActivity getDependantActivity();

        TaskActivity getDependeeActivity();

        Date[] getAlignedBounds();
    }

    int getDifference();

    void setDifference(int difference);

    Hardness getHardness();
    void setHardness(Hardness hardness);
}
